Okay, is it bad I didn't know until 20 weeks???

I apparently concieved in January but I had taken a test in February and it came back negative and still had my period til March... after that I figured in April I could be but I didnt start gaining any noticeable weight until the end of April and then at 20 weeks is when I had taken another test which came back positive and went to er to find out I was 20 weeks along... I panicked of course. I'm 25 weeks now and on prenatals and so far she's healthy weight and size and heartbeat... but should I be concerned it took so long before starting prenatals or that I had had some alcoholic drinks (not a lot! Just one or two here and there) in the beginning months? I'm so afraid she could end up with a disorder or something wrong because of everything but mother nature was playing trickery with me 😳